<h2>Problem 49</h2>
<div style="color:#666;font-size:80%;">01 August 2003</div><br />
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<p>The arithmetic sequence, 1487, 4817, 8147, in which each of the terms increases by 3330, is unusual in two ways: (i) each of the three terms are prime, and, (ii) each of the 4-digit numbers are permutations of one another.</p>
<p>There are no arithmetic sequences made up of three 1-, 2-, or 3-digit primes, exhibiting this property, but there is one other 4-digit increasing sequence.</p>
<p>What 12-digit number do you form by concatenating the three terms in this sequence?</p>

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